Low-Temperature Molecular Beam Epitaxy Growth of Single Quantum Well GaAs/AlGaAs Lasers

Abstract
We report on the low-temperature Molecular Beam Epitaxy (MBE) growth of single quantum well (SQW) GaAs/AlGaAs lasers under a low flux ratio. Lasing action was observed at a substrate temperature as low as 300°C. A threshold current density of 600 A/cm2 was obtained at the substrate temperature of 375°C, which is the lowest threshold current density below 400°C reported so far.